一、外墙为什么会渗漏现在建造的住宅和公寓楼,多为框架或混合结构,屋面采用卷材防水或刚性防水平屋面,外墙采用马赛克或面砖饰面,有些住宅楼仍采用混合砂浆拉毛麻面。在外装饰缺乏有效防水措施的情况下,大面积的外墙不可能完美无缺,如果遇长时间下雨,墙面有些裂缝或砂眼,雨水就会渗入墙内。 First, why the external wall leaks Now the construction of residential and apartment buildings, mostly frame or hybrid structure, the roof using waterproof membrane or rigid anti-level roof, exterior wall mosaic or tile finish, some residential buildings are still using mixed mortar Pull hairs and pockmarks. In the absence of effective external waterproofing measures, a large area of ​​the external wall may not be perfect. If it rains for a long time, there will be some cracks or trachoma on the wall, and rain will seep into the wall.